Due to its advantages of large capacity, long distance and anti-electromagnetic interference, optical fiber communication is well adapted to the development of power communication today. In particular, optical fiber composite overhead ground wire (OPGW), combined with the high mechanical , high conductivity and good corrosion resistance of aluminum coated steel wire, effectively combines the overhead ground wire with the communication optical fiber and is therefore greatly affected by the power system industry The importance of, and gradually be promoted to use.
There are many types of fiber optic home architecture, there are two main types: one is the point-to-point topology, from the central office to each user with a fiber; the other is the use of point-to-multipoint topology of passive light Network (PON), with point-to-multipoint Solutions that can significantly reduce the number of optical transceivers and fiber usage, and reduce the rack space required by the central office, with the cost advantage, has now become the mainstream.
Optical access equipment used in two main ways: one is deployed in the telecom operator's central office equipment, called Optical Line Terminal (OLT), the other is close to the client's equipment, called optical network unit (ONU). From the current development situation, fiber-optic home also involves a number of industries and categories, such as indoor fiber optic, engineering and application of the entire telecommunications industry and even the information industry are of strategic importance.
At present, in the optical fiber access field, the hot debate in the industry is that there are two technical solutions for passive optical networks: GPON and EPON. Simply put, the former multi-service support more powerful, more efficient transmission, suitable for all business operations era of high-end business customers and residential customers, but the cost is relatively high. EPON mainly for data transmission, the core advantage is the relatively low cost. At present, both techno
